20190323——HeadFirestPython学习之异常处理

man=[]
other=[]
try:
    data=open('sketch.txt')
    for each_line in data:
        try:
            (role,line_spoken)=each_line.split(':',1)
            line_spoken=line_spoken.strip()
            if role=='A':
                man.append(line_spoken)
            elif role=='B':
                other.append(line_spoken)
        except ValueError:
            pass
    data.close()
except IOError:
    print "the data file is missing"

    
try:
    with open('man_data.txt',"w") as out:
        out.write(str(man))
except IOError:
    print "the second missing"

写入文件用WITH代替try except finally
try:
    with open('man_data.txt',"w") as out:
        out.write(str(man))
except IOError:
    print "the second missing"

 

如果有二个文件可以用，隔开

with open('man_data.txt','w') as out, with open('other_data.txt','w') as out1:

    out.write(str(man))

    out.write(str(othe))

_______________________________________________

try:
    out=open('man_data.txt',"w")
    out.write(str(man))
except IOError as err:
    print 'File error:'+str(err)
finally:
    if 'data' in locals():
        out.close()